. The Street railway journal . pper wire has lately beencarried has led to the serious consideration of aluminum as a substitute by a number of companies, but it may not be generally known that the largest actual installation of itso far made is on the new Northwestern Elevated Railway,which has purchased 150,000 lbs. of aluminum feeders, ofwhich 75,000 lbs. are now in position. This wire is of1,300,000 cm. sectional area, and is used uninsulated. Itis supported every 9 ft. and anchored. The chief difficultywith aluminum in the past has been a question of welding,but this difficulty is said to
. The Street railway journal . pper wire has lately beencarried has led to the serious consideration of aluminum as a substitute by a number of companies, but it may not be generally known that the largest actual installation of itso far made is on the new Northwestern Elevated Railway,which has purchased 150,000 lbs. of aluminum feeders, ofwhich 75,000 lbs. are now in position. This wire is of1,300,000 cm. sectional area, and is used uninsulated. Itis supported every 9 ft. and anchored. The chief difficultywith aluminum in the past has been a question of welding,but this difficulty is said to have been entirely overcome inChicago, though the process is a secret one. The metal is,of course, non-corrosive and is considerably cheaper thancopper at present prices per unit of carrying capacity. The Calumet Company is finally coming back to woodas an insulation material for hangers and strain poles. Thebell shells are cast as in ordinary service, and the shell isthen filled with a wooden block held in position by an or-. FIG. 9 CABLE AND ELECTRIC CARS dinary bolt. The wood employed in the hangers and por-celain ears is first soaked in kerosene and then boiled inparaffine wax. ROLLING STOCK IN CHICAGO The visitor to Chicago will not be impressed with thecars of its surface railway system, for, truth to tell, thenumber of new and modern cars is far exceeded by that oftypes which are rapidly passing away, among these latterbeing practically the entire equipment of grip cars, to-gether with most of the horse cars which they have intow, for many of the principal lines are still running by thecable system, as above stated. As these cable grips andtrailers form so large a proportion of the whole rollingstock of the surface system, it may be well to briefly referto them in passing because of the good service they havedone. The standard grip and trail cars of the North and WestSide systems are shown in Figs. 7 and 8. The grip car October, 1899.] STREET RAILWAY JOURNAL 633 is enti
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
